/Engine/Source/Runtime/Engine/Classes/Kismet/GameplayStatics.h
Find all Actors in the world with the specified tag. This is a slow operation, use with caution e.g. do not use every frame.
static void GetAllActorsWithTag ( const [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, [FName](API\Runtime\Core\UObject\FName) Tag, [TArray](API\Runtime\Core\Containers\TArray)< [AActor](API\Runtime\Engine\GameFramework\AActor) * > & OutActors )